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Continue to ChatASCO 833-37010000 - DN6, G1/4, G Pressure Held On Loss Of Power (Fail Close), Servotronic Proportional Valve https://www.valves-direct.com/product/asco-833-37010000-dn6-g1-4-g-pressure-held-on-loss-of-power-fail-close-servotronic-proportional-valve/